Door-lock.



W. A. LURIE.

DOOR LOCK.

APPLICATION FILED MAR. 10. 1915.

1,168,525. Patented J'an.18, 1916.

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W. A. LURIE.

DOOR LOCK. I

APPLICATION FILED MAR. 10, I9I5.

l 168,525. Patented J an. 18, 1916.

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THE COLUMBIA PLANOGRAPH 120-. WASHINGTON. n- C.

WILLIAM A. LURIE, 0F CI-IIGAGO, ILLINOIS.

DOOR-LOCK.

messes.

Specification of Letters Patent.

Patented Jan. is, rare.

Application filed March 10, 1915. Serial No. 13,325.

To a! Z whom it may concern Be it known that I, WVILLIAM A. Lunrn, acltizen of the United States, and a resident of Chicago, in the countyof Cook and State of Illinois, have invented certain new and usefulImprovements in Door-Locks, of which the following is a specification.

My invention relates to door locks and may be considered as animprovement over th construction shown and described in my Patent No.1,102,527, dated July 7 ,1914, and in my application Serial No. 815,6230, filed June 17, 1914:.

The object of the invention is to reduce the number of parts and toprovide more simple and compact arrangement of the parts. 1

The inventionis of that class in which detent pawls are provided in thebolt head for preventing the bolt from being pried open. In the lock ofmyapplication referred to these pawls project beyond the bolt head whenthe bolt is in andmust drag across the edges of the bolt outlet openingparticularly when the door is slammed. Such drag of course introducesfriction and wear on the pawls and has the further dis advantage thatoutward. movement of the bolt would be impeded.

Another important object of my invention is therefore to provide meansfor keeping the pawls entirely within the bolt head during the time thatthe bolt is moving outwardly after the inward movement thereof caused byclosing the door by slamming.

The various features of my invention are clearly illustrated on theaccompanying drawings in which Figure 1 is, an elevational view of thelock with the cover plate removed and with parts in section to moreclearly show the construction and arrangement, Fig. 2 is a sectionalview on plane 2-.-2, Fig. 1, Fig. 3 is an elea ational viewsimilar toFig. 1 but showing tho'bolt in its inner position, Fig. 4 is a sectionalview on plane 4-t, Fig. 1, and Fig. 5 1s a front v ew of the outer endof a the bolt.

The lock mechanism is inclosed in a casing 10 having the face plate 11provided with the bolt opening 12. The bolt shank 13 terminates in thehead 1a having the tapered front surface 15, the bolt being adapted totravel longitudinally and being guided by the walls surrounding theopening 12, and by the guide studs 16. The bolt head is hollow andcontains pawls 17 and 18 pivoted at their inner ends on pins 19 and 20within the head 14:. The outer ends of the pawls have laterallyprojecting detent teeth a and Z9 respectively, these teethbeing adaptedtopass through passageways c and (Z to the exterior of the headtoproject be yond the upper and lower sides thereof. The wall sections21 and 22 limit the outward swing of the pawls. On the bolt shank 13 isa spreader bar 23 which is longitudinally slidable on said shank and isguided by means of screws 24 secured to the shank and extending throughthe longitudinal slot 25- position it will be released from the pawlsand these pawls will be swung to be entirely within the bolt head, asshown in Fig. 3, such swing being caused by springs 26 and 27 mounted'onthe bolt structure and engaging with the inner ends of the pawls asclearly indicated.

Extending through the lock casing is the bar28 whose ends support doorknobs. Within the lock casing is a hub 29 for receiving the polygonaldoor knob bar 28, this hub having upper and lower cam extensions 30 and31. Below the hub the lower wall of the lock casing provides a pivotridge 32 on which the lever 33 is pivoted, the lever having the notch 31m its lower end receiving the pivot ridge. The lever has the pocket 34for receiving the hub and has the upper and lower cam points 35 and 36at the edges of the pocket in position to be engaged by the cam arms 30and 31 respec tively on the hub. A. lateral abutment projection 37 atthe lower end of the lever 33 is engaged by a spring 38 anchored at itsother end between the lugs 39 and 40 on the lock casing, this springtending to hold the lever 33 in vertical position as indicated in Fig.1, in which position the campoints 35 and 36 are engaged by the cam arms30 and i rection cam arm 31 will engage the cam point 36 and will swingthe lever in thesaine the knob is turned the spreader bar 23 will beshifted, a distance before the bolt is shifted, this being for thepurpose of first effecting drawing in of the detent pawls before thebolt is drawnin upon turning of a door knob. In Fig. 1 the parts are innormal position, the'pin. ll resting against the frontvends of thenotches a2 and drespectively, the bolt being out and the spreader bar atits front end wedging the pawls outwardly so that the teeth as and 5abut against the face plate above and below the belt opening12. The boltis thus locked against inward movement by any implement inserted lbetween the door and the jamb. However, when the knob is turned andlever 33 swung the spreaderbar will be ininiediately shifted inwardlyaway from the pawls in order that springs-26 and 2? may draw thepawlsinto the bolt head, and then as soon as the bolt reaches the-innerend of the notch 42 the bolt will be drawn inwardly in order that thedoor may be opened. Upon release of the knob the spring 38 will swingthe lever 3-3 forwardly and the bolt will be shot outwardly and thespreader bar will 4 again spread out the pawls into detaining positionin front of the face plate. In order to allow closure of the door whenit is swung toward closed position without turnmg of the knobs, atrigger 46 is pivoted within the bolt head a plane at right angles tothat of the pawls, the outer end e of the trigger extending normallybeyond the surface15 of the bolt and the finger f on the triggerextending in front of the spreader bar 28. A spring 47 secured at oneend to the bolt shank engages at ltsother end against the abutment end 9of the trigger and tends to hold this trigger in its outer normalposition. l' henever the door is closed the trigger will engage with the'jamb plate and will be shifted into the bolt head, and therefore, whenthe door is pushed shut without turning of the knobs, the' head in thejamb and the trigger will be locked into the head of the bolt by theouter end of the spreader 23 by virtue of its surface riding over theouter surface of the finger of the trigger 4-6.

As soon as the bolt is released after inward movement thereof, either byturning ofalrnob or by contact of the front slanting face of the bolthead with thdjarnb plate, the. first part to move will be the spreaderbar and the pawls' will be spread apart to project their detent teeth.-This occur-share the bolt begins to move to its out pcs ion. Unlessprevented the detent teeth would therefore have to drag across the edgesof the bolt opening, and the friction would cause wearof the pawls, butthe main disadvantage would be that this friction would impede orperhaps block the out ward movement of the bolt. The outer ends of thepawl teeth have been rounded and the engagement of such rounded endswith the bolt opening edges has been depended upon swing the teeth intothe bolt head. Of

course where the lock parts are kept well lubricated the. pawls wouldreadily be swung into the bolt head and the friction of their front[ends with the-bolt opening edges would be negligible. However, locksare very seldom given much attention after their first installation andthe oil soon dries and the parts soon become gritty and roughened. Undersuch conditions the friction at the pawl pivots and of the front ends ofthe pawls against the openin edges might he s fl'icientto block the boltagainst outward movement. I therefore provide means for allowing thedetent pawls to be withdrawn into the bolt head before the bolt. itselfis released and to prevent spreading thereof until the bolt is entirelyout.

Pivoted tothe tip-standing lug 48 on the 1-9. Tie front end of thislever has the detent hook 50 for cooperating with the detent notch 51 inthe upper edge of the releasing bar 23, a spring 52 secured to the boltshank tending to hold the detent end 50 down. In the path of the upperend of the l ver 49 is the tripping abutment '53 extending in the lockframe. The position of this tripping abutment is such that just beforethe bolt reaches its outer position bol shank 13 is the bell crankdetent lever lie the. upper end of lever 4-9 will strike the abutmentand will swingthe detent end '50 up, as indicated in Fig. 1. When thebolt is eut'the detent notch 51 is a short distance in advance of thedetent end 50 of the lever,

but when the bolt is shifted inwardly the notch will come behind thedetent end 50 and then as soon as the lever leaves the trip pingabutment5-3 the spring 52 will swing the end 50 down into the notch or: against7 the releasing bar in advance of the notch.

Then when the bolt starts to move forwardly after an inward movement,the detent end 50 and notch 51 will cooperate to limit the forwardmovement of the spreader bar on the bolt, that is, the releasing barwill be stopped in its movement relative to the bolt just before suchengagement with the pawlsas would resultinspreading apart of the pawls.Such locking is maintained until the bolt head is practically entirelyout, and then the upper end of the lever 49 will strike the trippingabutment and the lever will be swung to unlatch the spreader barwhereupon the bar is moved out of its full distance and the pawls willbe spread to effect detent engagement of the teeth thereof with the lockface plate. Thus the shifting movement of the bolt is at no time impededby the frictional engagement of the pawls with the face plate andcomplete upward movement of the bolt and eflicient locking is at alltimes assured. Means are also provided whereby the bolt can be operatedby a key inserted in a lock cylinder- (not'shown) which is supported inthe pocket 5st provided in the lock wall. A bell crank lever is pivotedat its elbow adjacent the cylinder opening and itslower end has the pin56 extending through notches 57 and 58 in the bolt shank and spreaderbar respectively, the notch 57 being wider than the notch 58 and thearrangement beingprecisely the same as the arrangement with reference tothe pin 41 and the notches 42 and at at the inner end of the bolt wherethe bolt is controlled through turning of a door knob.v Pivoted abovethe bell crank lever is a lever 59 having an intermediate engaging point60 for cooperating with the top of the lever 55 to effect swing thereofwhen the lever 59 is swung. The lever 59 has connection with the keycylinder (not shown) and upon turning of the key the lever 59 will beswung from the position shown in Fig. 1 t0 the position shown in Fig. 3,this movement effecting swing of the bell crank lever 55 and inwardmovement of the bolt mechanism. Upon release and withdrawalofthe key thespringBS will be the cause of all the parts returning to normalposition.

It may also be desirable to prevent the look from being opened by meansof the door knobs. To this end the hub 29 carries a forwardly extendingwing61 having the notch 62 at its front edge for receiving the end ofdetent bar 63 which at its inner end is guided in the lug 64: on thelock casing and at its outer end 65 is guided in. the sleeve 66 in theface plate, this outer end forming a button. WVhen the bar 63 is shiftedinwardly it will engage in notch 62 and will lock the hub 29 andconsequently the bar 28 and the door knobs against turning and openingof the door will thus be prevented. To release the bar 63 from the notch62 another button member 67 is provided to be'operable through sleeve 68below the sleeve 66 in the face plate. This button member 67 isconnected by a rockinglever 6t Wlbll the bar 63, the lever being pivotedat an intermediate point on the pin 70 ex tending from the lock casing.With this lever arrangement, the bar 63 will be shifted outto releasethe knob mechanism when the button member 67 is. pushed in. A spring 71extending from the bar 63 and cooperate ing with the top of lug 6% tendsto lock the bar in either its in or out position.

I do not of course desire to be limited to the exact structures,arrangements and operations shown and described, as modifications are nodoubt possible which would still come within the scope of the invention.

I claim as follows:

1. In a door lock, the combination of a containing case having a faceplate provided with a bolt opening, a bolt men her having a head adaptedto slide through said. opening, detent pawls pivoted in said head andhaving detent teeth, means tendv ing to swing said pawls to be entirelywithin said head, a spreader bar slidable on said bolt member, springmeans acting on said bolt member andspreader bar,

and tending to force said members. outwardly-means for causing outwardmovement of the spreader bar on the bolt member before outward'movementof the bolt member by the springmeans, said spreader bar being adaptedduring the latter part of its outward movement to cooperate with saidpawls to spread them apart to carry their teeth beyond the sides of thebolt head, a detent member for checkingthe forward movement of thespreader bar on the bolt meme her before said spreader bar reaches fullouter position whereby to prevent coiipera tion of said bar with saidpawls and to allow the bolt head to reach its outer position while thepawls are still within the head, and means foreffecting release of thedetent member after the bolt head has reached its outer position wherebyto then allow the spreader bar to cooperatewith the detent pawls tospread said pawls tocarry their teeth into detent position beyond thesides of'said bolt head.

2. In a door lock, the oombinationof a containing casing having a faceplate provided with a bolt opening, a bolt member slidable within saidcasing and having a head adapted to pass through said opening, detentpawls pivoted within said headand having detent teeth at their outer.ends, springs on said bolt member tending to swing said pawls to carrytheir teeth beyond the upper and lower sides of the bolt head wherebywhen said bolt member is out said i spreader bar will tend to spread thepawls &

for engagement with said pawls to spread saidpawls to carry their teethoutwardly,

operation rearwardly of the shifting mech-' anism said spreader bar willfirst withdraw from the pawls before-the bolt is shifted 'rearwardly andwhereby during outward operation of the shifting means said apart beforeoutward shift of the bolt, and detent means for cooperating with thespreader bar during outward movement'of lthe boltinember for preventingoutward movement of the bar on the member to thereby prevent spreadingofthe pawlsby said bar'while the bolt'head is passing through I saidopening, and means for releasing the detent means after the bolt memberis inits outer position whereby to aliow. forward ,movement of saidspreader bar and spread ing apart of the pawls.

in a lock,- the combination of a containing casing having a face plateprovided with a bolt opening, a bolt member slidable within said casingand having a head adapted to pass through said opening, pawls pivoted insaid head and having detent teeth at their outer ends, springs on thebolt member acting on said pawls to swing them to be entirely withinsaid head, a spreader bar slidable on said bolt member, means tending toshift said bar forwardly on said bolt meinberand' into wedgingengagement with saidpawls to spread saidpawls outwardly to carry theirteeth beyond the upper and lower sides ofthe bolt head, actuating meansfor shifting'said bolt member inwardly, a

connection between said actuating means and said spreader bar foreffecting rearward movement of said bar on said bolt memberbeforeiinward actuation of said bolt member whereby said pawls are firstreleased and allowed to swing into the bolt head before inward movementof the bolt member, spring means adapted upon release of said actuatingmeansto restore same to normal position, said spreader bar-tending uponsuch restoring'movement to shift forwardly on the bolt member to spreadthe'pawls apart before forward movement of the bolt member, and detentmechanism for preventing such forward movement of the bar until the boltmember has substantially reached itsouter position wherebythe said pawlswill be re tained within the bolt head until the bolt head reaches itsoutermost position.

i. In a lock, the combination of contain ing casing havin a front wallprovided with a bolt opening, abolt reciprocable within said casing andhaving a head adapted to pass through" said opening, detent pawlspivotedwithin said head and having detent teeth at their outer endsadapted upon spreadin apart of the pawls to extend be yond the upper andlower sides ofthe bolt head to block inward movement of the bolt head,means on said bolt member tending to swing the pawls td'be' within thehead, a bar slidable on said bolt member and adapted when in its outerposition to engage at its front end between said pawls to spread them tocarry their teeth beyond the sides of the bolt head, shifting mechanismfor controlling the outward and rearward shift of the bolt and bar andadapted during shift in either direction to first'cause primary shift ofthe bar whereby during inward shifting said-bar will first be releasedfrom the pawls before the bolt I is shifted inwardly and whereby duringthe outward shift said bar will tend to engage with the pawls beforeoutward shift ofthe bolt, means for locking bar to the bolt member awayfrom said pawls during outward movement of the bolt member to prevent,swinging apart of the pawls during such outward movement, and means forreieasing the bar after the bolt member has been shifted outwardly.

5. In alock, the combination of acontaining casing having a front wallprovided with a bolt opening, a boltreciprocable within said casing andhaving a head adapted to pass through said opening, detent pawls pivotedwithin said head and having detent teeth at their outer ends adaptedupon spreading apart ofthe pawlsto extend beyond the up: per andlowersides of the bolt head to block inwardniovementof the bolt head, meanson said bolt meinber'tendingto swing the pawls to be within the head, abar slidable on said bolt member and adapted when in its outer positionto engage at its front end between said pawls to spread them to carrytheir teeth beyond the sides of the bolt head, shifting mechanism forcontrolling the outward and rearwardshift of the bolt and bar andadapted during shift in either direction to first cause primary shift ofthe bar whereby during inward shifting said bar vwill first be releasedfrom the pawls before the bolt is shifted inwardly and whereby duringthe outward shift said bar will tend to engage with the pawls beforeoutward shift of the bolt, a latch for locking the bar against outwardmovement on the bolt member to prevent said bar from spreading the pawlsduring outward movement of the bolt member, and means for tripping saidlatch during the latter part of the outward movement of said bolt memberwhereby said bar may then cooperate with the pawls to spread them apartafter the bolt head has reached outer position.

6. In a lock, the combination of a containing casing having a front wallprovided with abolt opening, a bolt reciprocable within said casing andhaving a head adapted to pass through said opening, detent pawls pivotedwithin said head and having detent teeth at their outer ends adaptedupon spreading apart of the pawls to extend beyond the upper and lowersides of the bolt head to block the inward movement of the first causeprimary shift of the bar whereby during inward shifting said bar willfirst be released from the pawls before the bolt is shifted inwardly andwhereby during the outward shift said bar will tend to engage with thepawls before outward shift of the bolt, a latch member pivoted on saidbolt member and adapted for latching engagement with said bar to preventoutward movement thereof on the bolt member during outward movement ofthe bolt member whereby to prevent spreading apart of the pawls by saidbar during outward movement of the bolt member, and means for releasingthe latch member from said bar after said bolt member has practicallyreached its outer position whereby said bar may then effect spreading ofthe pawls.

7. In a lock, the combination of a containing casing having a front wallprovided with. a bolt opening, a bolt reciprocable within said casingand having a head adapted to pass through said opening, detent pawlspivoted within said head and having detent teeth at their outer endsadapted upon spreading apart of the pawls to extend beyond the upper andlower sides of the bolt head to block inward movement of the bolt head,means on said bolt member tending to i swing the pawls to be within thehead, a bar slidable on said bolt member and adapted to engage'at itsfront end between said pawls to spread them to carry their teeth beyondthe sides of the bolt head, shifting mechanism for controlling theoutward and rearwardshift of the bolt and bar and adapted during shiftin either direction to first cause primary shift of the bar wherebyduring inward shifting said bar will first be released from the pawlsbefore the boltis shifted inwardly and whereby during the outward shiftsaid bar will tend to engage with the pawls before outward shift of thebolt, a bell crank latch lever pivoted at its elbow to said bolt membermeans for holding said latch member in latching engage ment with saidbar to prevent outward movement of the bar on the bolt member when saidbolt member is shifted outwardly, and a tripping abutment in the path ofsaid latch lever for effecting release thereof from the bar after thebolt member has practically reached its outermost position where uponsaid bar may then effect spreading apart of said pawls.

In witnesswhereof I hereunto subscribe my name this 3rd day of March, A.D., 1915.

"WILLIAM A. LURIE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. G.

